Viper 256P hum

Updated
brndnbss
Just received a Viper 256P today. I know these guitars feature stacked pickups, but I don't notice any hum cancelling at all when either pickup is soloed. In fact, the hum is louder than my Gibson SG with single-coil P90's.I checked the wiring and it looks correct, assuming these pickups should be wired in series; white to ground, green and black connected, red to pickup selector. Anyone have any experience with these?
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